Phosphoprotein Detection by High-Throughput Flow Cytometry

Area of Science:

• Biotechnology
• Cellular Biology
• Immunology

Background:

• Phospho flow cytometry detects protein phosphorylation using phospho-epitope-specific antibodies, similar to Western blotting.
• Unlike Western blotting, it provides multidimensional, quantifiable single-cell data, enabling analysis of small cell populations within complex mixtures.

Purpose of the Study:

• To highlight the advantages of phospho flow cytometry for analyzing protein phosphorylation at the single-cell level.
• To demonstrate how fluorescent cell barcoding enhances phospho flow cytometry for high-throughput applications.

Main Methods:

• Utilizing phospho-epitope-specific antibodies for protein phosphorylation detection.
• Employing single-cell analysis to obtain multidimensional, quantifiable data.
• Integrating fluorescent cell barcoding for multiplexed sample analysis (up to 64 samples).

Main Results:

• Phospho flow cytometry allows for the analysis of up to 30 phospho-specific antibodies and cell surface markers in a single experiment.
• Fluorescent cell barcoding enables medium- to high-throughput analysis by combining multiple samples.
• Single-cell resolution permits detailed characterization of distinct cell populations.

Conclusions:

• Phospho flow cytometry is a powerful tool for studying protein phosphorylation events with high resolution and throughput.
• The integration of fluorescent cell barcoding significantly advances the capabilities of phospho flow cytometry for large-scale studies.